gallimore and d



J. GALLIMORE AND D. COOK.

GAS OVEN 0R FURNACE.

APPLICATION FILED JAN-10. 19H.

Patented Nov. 25, 1919.

2 SHEETSSHEEI l.

hm M 2 SHEETS-SHEEI' 2- Patented Nov. .25, 1919.

GAS 0VEN 0R FURNACE. APPLICATION FILED JAN. 10. Ian.

1. GALLIMORE AND 0. COOK.

III.-

ens OVEN on summon.

Specification of Letters Patent. 7 Patented NOV. 25, 1919.

Application filed January 10, 1917. I Serial No. 141,656.

To all whom it may concern Be it known that we, JOHN GALLIMORE and DANIEL COOK, subjects of the King of Great Britain, and residents of Edinburgh, Scotland, have invented certain new and useful Improvements in Gas Ovens or Furnaces, of which the following is a specification.

This invention relates to improvements connected with gas ovens or furnaces and has reference particularly to gas ovens havinga multiplicity of burners. V

The primary object of the invention is to provide means whereby all the burners may be controlled from a central point in such a manner as to maintain a constant pressure on the gas supplied to each burner.

A further object of the invention is to provide means whereby the conditions under which the burners are being employed at any oiven time can be readily ascertained, and a further object is to provide convenient and economical means by which the burners can be lighted. The invention therefore consists broadly in the provision of means whereby the number of burners in use can be readily controlled within certain limits from a central position in contradistinction to the reduction of the supply and pressure to all the burners.

A further feature of the invention isthe provision of an igniting burner adapted to light all of a series and itself be ignited by a single pilot light.

A further feature consists in providing an interlocking means whereby the turningon of the burners cannot occur until after the igniting burner has-been lighted and means whereby when the burners have been lighted the igniting burner can be turned out,'and a further feature consists of an indicator associated with the control valve by means of which the number of burners in use can be readily ascertained at any time.

In the accompanying drawings we have illustrated a practical embodiment of the invention, Figure '1' being a longitudinal ele vation of a gasoven with our invention ap' plied thereto.

Fig. 2 is-a sectional plan of Fig. l.

Fig 3 is a cross section on line A A- of Fig. 1. I

Fig. 4 is apart sectional elevation of the control valve chamber.

Fig. 5 is a part sectional plan view of Fig. 4.,

-F 6 is a section on line BB of Fig. 4: look ng in the direction of the arrow.

Fig. 7 is an end view of a part of Fig. 4.

Referring to these drawings the numerals 1, l 1 1 designate multiple valves grouped together at some convenient point where the gas supply is connected for instance by means of a pipe 2. These valves are provided with ports 3 to supply variable groups of burners 4C, 4", 4: 4, and the turning of index plates 5 operates to alter the number of burners turned on or off.

If We take as an example a traveling chain oven say 45 feet long with 28 burners on the top and 28 burners on the bottom, these may be divided into four main groups with a multiple valve to each main group.

If we regard the oven as divided in two lengthwise and call one end F the feed end and the other end D the delivery end, we

distribute the control valves as follows: one designated 1 to the top feed end burners; one designated 1 to the bottom feed end burners; one designated 1 to the top delivery end burners, and the remaining one designated 1 to the bottom delivery end burners.

Each of these groups can be subdivided into any number of smaller groups. As an example we will assume each valve to sup ply three different groups of burners containing 3, 5 and 6 burner in each group respectively. In this example the indicator 5 on the valve would show eight different valves, viz. 3, 5, 6, 8, 9, 11, let and off, showing eight difierent positions for the valve as indicated at E Fig. 5. It will be seen upon reference to Fig. 6 that from the outlet of the valve there are three supply pipes to the burners; one pipe designated 6 supplies three burners, a second pipe designated three burners, one to the pipe 7 open ng five burners, and one to the pipe 8 giving six burners. The ports can be grouped to give eight burners (5 and 3), nine (6 and 3), eleven (6 and 5'), and fourteen (35, 5 and 6) the eighth position being blank, thus en-' tirely cutting ofi all the burners. Various" combinations of these four valves-will give burners ranging from 3-to 56 in the whole oven top and bottom. a

The our valves mentroned above can be the maximum pressure of the gas is operat ing on all the burners in use.

The arrangement for lighting the burners as they are turned on, is also controlled from 7 a given point, preferably from the same center as the burner control valves. A convenient means for effecting this is to provide two slotted or perforated burners 10 carried the full length of theoven in close proximity to the cross burner tubes in the top and bottom rows. These long burners are supplied from the main pipe or receiving box. 9 as found most convenient and controlled by one or more valves such as indicated at 11 Fig. 6 at the chosen center of control. When this control valve 11 is opened these long burners are lighted by means of a constant burning pilot light 12 situated at aconvenient point and the flame travels the full 7 length of the oven. We have thus a lighting flame in position to light any group or all of the 28 burners respectively in the top and bottom rows. This arrangement is a con siderable saving in time and labor if 'com pared -with the -1116tl10d of lighting each burner separately, or a great saving in gas, when compared with a pilot light to each burner. W hen the required burners are lighted this lighting flame is turned ofl" at the valve.

We propose to provide a safety locking arrangement to prevent the gas burners proper 14 being turned on in the oven before the lighting burner has been lighted. One

method of effecting this is as follows: The hand wheel 15 on the burner valves are notched on the periphery as at 15 or provided with cam surfaces to correspond with the number of positions on the valve (in the example taken this is eight), and into one of these notches a lever 16 falls; this lever is connected with the lighting valve by means of suitable links 17 or by any suitable, gearing,'so that when the locking lever 16 is in a notch the lighting valve 11 is shut and the burner valve securely locked. To make a change on the burners it will be necessary to lift the lever 16 locking the hand wheel,

by means of the foot pedal 16 and the rod.

16", and this automatically opens the lighting valve 11, and the long lighting burner is lighted in turn from the small pilot light in'-" side the oven. The burner valve is now ad.- justed as desired, and a pivoted weight 18 connected to the locking lever by the connection 19 brings the lever back into the corre-,

sponding notch in the hand wheel. To give the burnersin the oven time to light the above mentioned weight may be cushioned by means of suitable gearing 22, 22

the burners actually lighted in the oven consists in providing a revolvingdrum or prism 21 and connecting same to the burner valves On the periphery of this drum arev fixed a number of scales or diagramscorresponding to the burners in the oven. Certain burners on each scale would be specially emphasized to correspond with the groups on the valve and would indicate the number and actual posi tion of all burners lighted at one time. Thus if the valve was set to have'9 burners lighted in the oven the scale would show the nine burners and their exact position. If desired the drum or prism may be incased and the casing would be provided with an opening 23 admitting to view only one chart or diagram at a time. Moreover the drum may be in some circumstances replaced by a revolving disk.

What we claim and desire to secure by Letters Patent is H Y 1. A device of the character described comprising in combination with a plurality of burners, a plurality of groups of valves I provided with ports for supplyingvariable groups of burners, index plates for indicating the number of burners turned on'or off,

means for lighting the burners, a valve for controlling the lighting means, and means 7 for preventing operation of the burner valves before the lighting valve has been operated.

2. A device of the character described comprising in combination with a plurality of burners, a plurality of groups of valves. provided with ports for supplying variable groups of burners, index plates for indicating the number of burners turned on and off,

a pilot light for lighting the burners, a light ,ing valve, a hand wheel on each burner valve notched on its-periphery, sald notches corresponding in number to the number of positions of the valve and a lever adapted to fall into the said notches connected-with the lighting device.

3. A device of the character described,

comprising in combination with a plurality of burners, a plurality. of groups of valves provided with ports for supplying variable groups of burners, index plates for indicating the number of burners turned on and out, a pilot light for lightnig the burners, a lighting valve, a hand wheel connect-ed to each burnervalve and provided with notches on its periphery, said notches'corresponding in number to the number of positions of the valves, a lever adapted to fall into said.

notches, means for connecting said lever to V the lighting valve, means for liftingsaid lever for allowing the adjustment of the burner'valve, means for returning. said lever into its engagement With one of the notches in said hand Wheel, means for retarding the motion of said last named means, and means for automatically indicating the number and position of the burners actually in operation, substantially as described.

4. A device of the character described comprising in combination With a plurality of burners, a plurality of groups of Valves provided with ports for supplying variable groups of burners, index plates for inclicating the number of burners turned on and ofl, a pilot light for lighting the burners. a lighting valve, a hand Wheel connected to each burner valve and provided With notches on its periphery, said notches corresponding in number to the number of positions of said valve, a lever adapted to fall into said notches, links for connecting said lever to the lighting valve, a foot pedal for lifting said lever for automatically opening the lighting valve, a pivoted Weight connected to said lever for returning the same into engagement with one of the notches on said hand Wheel, means for retarding the operation of said Weight, and means for auton'iatically indicating the number and position of the burners actually in operation, substantially as described.

5. A device of the character described, comprising in combination with a plurality of burners, a plurality of groups of valves provided With ports for supplying variable groups of burners, index plates for indicating the number of burners turned on and 01f, a pilot light for lighting the burners, a lighting valve, a hand Wheel connected to each burner valve and provided with notches on its periphery, said notches corresponding in number to the number of positions of the valve, a lever adapted to fall into said notches, links for connecting said lever to the lighting valve, a foot pedal for lifting said lever for automatically opening the lighting valve, a pivoted Weight connected to said lever for returning the same into engagement with one of the notches in said hand Wheel, a dash pot, a piston operating in said dash pot and engaging said Weight for retarding its operation, and a revolving drum and gearing connected to said drum and said burner valves for automatically indicating the number and position of the burners actually in operation, substantially as described.

In testimony whereof We aflix our signatures in presence of tWo Witnesses.

JOHN GALLIMORE. DANIEL COOK. lVitnesses HELEN SUTHERLAND, Gnomes WHITELAW. 

